We acknowledge Victoria's Traditional Owners as the original custodians of the lands on which we work. We offer gratitude and pay respect to Elders past and present.

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Application of wye strainer: Y - type filters ensure that all equipment pipes are installed free from blockage and damage caused by impurities, rust, welding ...

No, drip tube isn’t simply holes punched into poly pipe. Inside each hole is an intricate dripper which delivers that water nice and evenly. Punching a hole will simply create an uncontrolled leak!

We definitely don’t recommend it. Typically, drip tube will deliver the water at a far slower rate that sprays. Because of this, if you were to have both on the same zone, the areas with drip would be left far drier than the areas with sprinkler coverage. If you do want to water some areas with drip & some with sprinklers, it can be done, but each will just need to be run on their own separate irrigation zones.

Over pressure occurs where piping or equipment is subjected to a pressure exceeding a pre-determined value. For example, where the inlet pressure on a single stage regulator is 1,200 kPa (cylinder pressure) and the outlet is 3 kPa.

In an over-pressure situation, the pressure acting below the diaphragm (at a set point) overcomes the relief spring pressure and gas passes to atmosphere. Some regulators have full relief (under certain conditions) and others have partial relief.

Over pressure protection prevents the pressure in gas pipework or in gas appliances from exceeding a predetermined value. It will ensure a safe situation exists in the event of malfunction or failure of any gas pressure regulator.

As you install a system, it’s almost inevitable that small fragments of dirt will get into the pipe, for this reason you should always flush out the system before running it the first time. This can be done by leaving an open end at the farthest point of each irrigation zone & operating the zone for 15 or so seconds to flush it out. Then plug it up & you’re good to go! This can also be said for any other times dirt may have gotten into the system (eg: further irrigation repairs or a mains water supply fault).

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The main cause of blowout is pressure. Whether it’s poly fittings, PVC fittings or timers, whatever the component, if the pressure is too high for what it’s designed for, kaboom! Simply solve the problem with a pressure reducer & make it a brass one if it’s on your water supply.

A decision will need to be made by the installation designer, piping installer, or appliance installer about the most appropriate over-pressure protection method. Because each method has advantages and disadvantages, considerations must include the

An OPSO device shuts off the supply of gas at a pre-determined setting. Over-pressure is sensed on the outlet side of the regulator. Manual reset is required to restore supply. Some regulators fitted with OPSO also have internal relief, in which case the OPSO setting must always exceed the relief pressure setting.

Each sprinkler & nozzle will push out water at different rates, but the key factor is the flow rate of your water supply. Work that out with a simple timed bucket test. From there, you can work out how much water each sprinkler you’re looking at uses & work within your flow limit. For more information, check our Product Guides.

Plastic pressure reducers can’t handle constant high pressure so the benefit with a brass pressure regulator is that you can put one on at the water connection for a drip irrigation system rather than one plastic pressure reducer on each zone.

Need more help with Pressure Reducers & Filters, Pressure Regulating Valves ? Check out these handy resources from our Help Centre

There’s no best type of sprinkler, just better sprinklers for different applications. Gear Drives are better for large areas, over 5m. Pop-Ups are ideal for 1.5-5m & Micro sprays are excellent for anything under that.

Maximum over-pressure is the maximum pressure the installation or any particular portion of the installation, or individual component including appliances, remains safe and for:

Even on a typical domestic system running on mains water a filter is still a good idea. In the event of a water main fault where rubbish does find it’s way down the line, a filter will protect the system from blockage and or failure. On systems operating off recycled water, like from a tank, a screen filter is mandatory. Debris like silt & dirt from recycled water is the most common cause of blockages of failures in irrigation systems.

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Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping ...

If, under normal operating conditions, the outlet pressure rises to approximately 4 kPa, the regulator will lock-up and prevent any further increase.

Drip tube is excellent in areas of rich dense soil where water spreads nicely throughout. Installed under mulch, the water is delivered with minimal evaporation & wastage, going direct to the root ball.

If precautions are not taken to limit an over-pressure situation, downstream equipment like appliances and other regulators may be damaged and combustion affected.

Pressure relief valves are a method of protection installed on the outlet side of a regulator to protect the downstream installation. They have no other function and gas does not flow through them under normal operating conditions. A threaded relief outlet allows the connection of a vent pipe. It is essential that a relief valve be properly sized.

However, if the regulator valve does not seat properly, the inlet pressure will pass down-stream into the consumer piping potentially resulting in:

20 Mar 2024 — Adjust the Valve: Using a crescent wrench, loosen the lock nut and turn the adjustment screw counterclockwise to lower the water pressure.

Plastic pressure reducers can’t handle constant high pressure so the benefit with a brass pressure regulator is that you can put one on at the water connection for a drip irrigation system rather than one plastic pressure reducer on each zone.

These brass fixed pressure regulating valves are ideal for systems which require reduced & regulated pressure, like drip irrigation systems. For areas with high pressure.

An OPSS device is installed as a separate component, and is usually located upstream of the regulator (1st or 2nd stage) with a piped connection to sense pressure downstream of the regulator.

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Any other proposed alternatives, such as high pressure switches combined with appropriately rated components, should be discussed with Energy Safe Victoria at the design stage.

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Regulators with internal (full or partial) pressure relief that are located within a building must be fitted with a vent line terminating outside the building, as per AS/NZS 5601.1, clause 5.11.5.

Regulators with internal pressure relief have a spring-loaded relief opening in the diaphragm bearing plate. Two springs are located beneath the sealing cap and adjustment screw, with the:

These brass fixed pressure regulating valves are ideal for systems which require reduced & regulated pressure, like drip irrigation systems. For areas with high pressure.

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Luckily the replacement unit was the same length as the old 2 to 1 reducer. So replacement was effected in 15 minutes. The new 500kPa pressure reducer exhibits a higher flow rate characteristic relative to the replaced unit. Supply and postage was prompt.

OPP prevents gas pipework or appliance gas pressures from exceeding a predetermined value, ensuring a safe situation exists in the event of gas pressure regulator malfunction or failure.

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The currency and accuracy of this document cannot be guaranteed once printed or saved to a storage device. If in doubt, please check the ESV website for the current version.

Any part of the gas installation that is not rated to withstand the inlet pressure to its gas pressure regulator shall be provided with over-pressure protection.